Lamp-socket lock.



unrrnn .srArEs PATENT OFFICE.

JULiUs c. insonne, or'nAsT sT. Louis, ILLiNois.- LAMP-'socKE-r Loox.

Speccaton of Letters Patent.

Patented March 1'3, leoe.

Appunti@ tied January 6,1905. sesamo; 239,917.

To @ZZ whom it may concern:

Be itknown that I', JULIUSVC. KIRcH-ER, a

.. citizen' of the United States, residing at East St. Louis, St. Clair county, Illinois), have in- Vented a certain newy and usefuliglmprovement in lLamp-Socket Locks, of ivhich the following is a full, clear, and exact ldescri t tion, such as willlenable others skilled in t e art to which it appertains tomake and'use the same, reference being had tothe accom panying drawings, forming part of this specication, in which- Figure 1 is a vertical sectional viewthrough a lamp-socket t'o which invention isapplied and showifng the lamp 'in its locked position. li`i 2 'is a similar view showing the lamp detac ed.'I Fig. 3 is atop plan view of the removable'v collar, and Fig. 4 is a similar" view of tlie lamp.

'cannot be easily removed from by unauthorized persons.

This invention relates to a lock for incandescent lamps; and one of the objects thereof is to provide means whereby .the lamps theirfsockets lIn large factories, packing-houses, and the like it is part of the s Y of the lamps furnishe each department dur. ing a given period. Experience. has demonstrate that in order to make a Uood showing persons from one department Wi l remove the perfect,` lamps from those of another department and substitute damaged ones from their` own department instead.

It is the purpose of this invention to overcome this objection as well as to prevent an easy removal of the lamp unless proper tools are employed. v

In .order to illustratethe preferred iorm of my invention, I have shown the lamp ap plied ,to a common construction of socket, 1n which.-

i lldesignatevsl the socket-head, and 2 the removable c ollagr carried thereby. This collar is usually held to its head'by means of screws` In the construction illustrated in the draw ings the` socket flfiead is yprovided Lwith-.a lidest'em to keep a record interna ly-threaded ortion 11 in the end of the lamp. When t e lamp is screwed into its socket, the portion .11 will l'be caused to engage the portlon 10, and as the notch 8 will bp opposite thecatch or dog 9 the attaching o t e lamp to the projection 10 may be the og 9 Wi l'easily pass over the notched portion of the lamp. reverse movement of the lamp, however, will be prevented, be-

cause the slightest tendency of the lamp to'.

pendin projection 10, adapted to engage theeasilyy accom lished, because the free end of 4 reverse its direction will cause the free end of the dog 9 to en age one of the notchesS. :It will therefore e apparent 'that while the lamp may easily be attached to-its socket it cannot easily be removed. Should the lament` break, however, or should` it become necessary to remove the lamp for any purpose, this can be done by loosening the screws 3 by the Vuse of a suitable tool, such; as a screw-driver,v and turning the collar 2, so that the portions 5 of the bayonet-slots willregister with the: screws 3, whereby the collar may be vsli ped off Athe socket head 1, as illus- ,trate 1n Fig. 2. Whenin this position, the

lamp may be readily unscrewed from the pro-- jection 10. l While I have described and illustrated in detail the preferred form of ymy invention,

together with the preferred-form of socket to y be employed therewith, .I would have it understood lthat I do not limit m selftothe eX- act details of construction. sliown', but reserve the right to make such slight changes in the form, proportion, and minor details of construction as may suggest themselveslfrom time to time and fall within the scope of the following claims.

',Havin thus describedthe invention, what is claime as new, and desired to be secured by Letters Patent, i's- A 1. Alamp-socket comprising ing a collar detachablv connected thereto, in combination with a va connecting it to the'heaA v of the socket, andalock forpreventing the removal' of the lampi'y While ythel collar is in operativeposition on'the. head of the socket, said lock'comprisin two' parts, one of which is on the lamp an the. other on the collar ofthe socket; substantially as described.

a headihav- IOO In having means for 2. A lamp-socket. comprising ahead-have.'

ing

a' collar detachably connected/ thereto', frio'v a threaded proection on the head, a yielding revented from being In testimony whereof I hereunto affix my signature, in the presence of two witnesses, 1o this 3d day of January, 1905.

JULIUS C, KIRCHER.

Witnesses LENORE WILSON, GEORGE BAKEWELL. 

